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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
(A) Fluorescence spectra of NBD-S-TM (4 µM) at different HOCl content (0–7 µM) in a phosphate buffer solution (50 mM, pH 7.4) with MeCN (10%); λex = 490 nm, λem = 550 nm).; (B) The plot of the intensity at 550 nm versus the concentration of HOCl (0–7 µM).